Single Photon Counting Module COUNT®-Series
8Pages

Single Photon Counting Module COUNT®-Series Description Laser Components’ COUNT® series of Single Photon Counting Modules has been developed to offer a unique combination of high photon detection efficiency, wide dynamic range and ease of use for photon counting applications. Combining LASER COMPONENTS’ ultra-low—noise VLoK silicon avalanche photodiode with specially developed quenching and signal processing electronics, the module offers everything needed for single photon detection from 400 – 1000 nm. Incoming photons generate corresponding electrical pulses which may be conveniently read out at the TTL output. The gating function allows the module to be disabled between measurements to provide protection against accidental overload. The optional FC connector provides a convenient method for connecting the module to the sample using a multimode optical fiber. Extremely low dark count rates Detection efficiency > 70% Optional FC fiber connector Single 12 V DC supply operation Stable count rate (no bi-stability) Confocal microscopy Particle sizing Fluorescence analysis LIDAR Astronomy Quantum cryptography Germany & Other Countries Laser Components GmbH Tel: +49 8142 2864 – 0 Fax: +49 8142 2864 – 11 info@lasercomponents.com www.lasercomponents.com United Kingdom Laser Components (UK) Ltd. Tel: +44 1245 491 499 Fax: +44 1245 491 801 info@lasercomponents.co.uk www.lasercomponents.co.uk Nordic Countries Laser Components Nordic AB Tel: +46 31 703 71 73 Fax: +46 31 703 71 01 info@lasercomponents.se www.lasercomponents.se

Single Photon Counting Module COUNT®-Series Technical Specifications for COUNT® Module Parameter Spectral range Counts/s Counts/s Counts/s Counts/s Counts/s Pd variation at constant temperature Active area diameter (nominal) Timing resolution Photon detection efficiency Pd1 at: 405 nm 670 nm 810 nm Afterpulsing probability Dead time Gating input voltage Gating on (= disable module) Gating off (= enable module) Gating input response time Gating on (= disable module) Gating off (= enable module) TTL output pulse length TTL output pulse amplitude (into 50 Ohm) Delay between photon impact and...

Single Photon Counting Module COUNT®-Series Absolute Maximum Ratings Min. Operating temperature Supply voltage Humidity at 40°C Storage temperature Count rate Fiber Connection Option The COUNT®-XX-FC has a FC-style fiber-optic receptacle pre-aligned to the optical detector surface. The GRIN lens used in this assembly is optimized and AR-coated for the range 440 – 1000 nm. Heat Dissipation In order to avoid damage to the module adequate heat sinking must be provided by placing or mounting the module onto a suitable heat sink, e.g. an optical table. TTL Output & Power Supply In order to not...

Single Photon Counting Module COUNT®-Series Saturation The photon count rate rolls off at high incoming light levels. The count rate at which the output starts to decrease is called the saturation point. Precautions should be taken to avoid prolonged exposure excessive light levels that may damage the COUNT® module. Warranty A standard 12-month warranty following shipment applies. Any warranty is null and void if the module case has been opened. Warranty is void if the module input exceeds 12.5 V. ESD Information Modules should only be handled at an ESD-safe work station. Individual Module...

Single Photon Counting Module COUNT®-Series Fig. 1: Typical Photon Detection Efficiency (Pd) vs. Wavelength Fig. 3: Beam diameter on detector surface vs. relative intensity of Pd referring to maximum value Germany & Other Countries Laser Components GmbH Tel: +49 8142 2864 – 0 Fax: +49 8142 2864 – 11 info@lasercomponents.com www.lasercomponents.com United Kingdom Laser Components (UK) Ltd. Tel: +44 1245 491 499 Fax: +44 1245 491 801 info@lasercomponents.co.uk www.lasercomponents.co.uk Nordic Countries Laser Components Nordic AB Tel: +46 31 703 71 73 Fax: +46 31 703 71 01...

Correction factor non-linearity Every COUNT® has an inherent dead time of approximately 43 ns after detecting a photon. During this dead time, the COUNT® is „blind" and can not detect further photons. As a consequence, the measured counting rate is lower than the true actual counting rate. The true actual counting rate can be calculated from the measured counting rate as follows: actual counting rate = measured counting rate T„ = SPAD dead time The dead time effect can also be seen as a deviation from the unity of the ratio between the actual counting rate and the mea- sured counting rate....

Single Photon Counting Module COUNT®-Series Package Drawings Window Version Optical distance from top of window to active area plane: typ. 1.35 mm Dimensions in mm Fiber Connector Version Interface Information ▪▪ Power Supply: LEMO connector, item number FGG.OB.302.CLAD42 (optional COUNT® power supply is available upon request). ▪▪ Gate input: SMA connector ▪▪ TTL output: LEMO connector, compatible with LEMO/BNC adapter ABF.00.250.CTA. An optional cable with the appropriate LEMO connector at one end and BNC connector at the other is available upon request. ▪▪ Optical input (FC connector...

Single Photon Counting Module COUNT®-Series Product Number Designations Dark count rate FC-Connector (optional) Fiber Number Designations Diameter Core Numerical Aperture FC/PC // FC/PC FC/PC // FC/PC FC/PC // FC/PC Part number Fiber Type Connector Type Product Changes LASER COMPONENTS reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result to their use or application. Ordering Information Products can be ordered directly from LASER COMPONENTS or its representatives. For a complete listing of representatives,...